Peng Zhang
Harbin Institute of Technology
Surface roughnessUltimate tensile strengthAmorphous metalFinite element methodDeformation (engineering)DislocationComposite materialFlow stressMetallurgyGrain sizeMaterials scienceConstitutive equationCorrosionSuperalloyAlloyFracture (geology)Grain boundaryNickelMachiningCopperMachine toolAnnealing (metallurgy)Mechanical engineeringMicrostructureStress (mechanics)
78Publications
11H-index
445Citations
Publications 76
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#1Peng Zhang (HIT: Harbin Institute of Technology)H-Index: 11
#2Han Wang (HIT: Harbin Institute of Technology)H-Index: 2
Last. Gang Chen (HIT: Harbin Institute of Technology)H-Index: 179
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Abstract null null To investigate the effect of cryogenic temperature on the deformation mechanism of thin sheets of pure copper, uniaxial tensile experiments were conducted in the present study. The strength and ductility obtained at 77 K are higher than those of the tensile samples deformed at 295 K. Moreover, samples with large grain sizes have a larger ductility enhancement. The kernel average misorientation analysis results suggested that the dislocation density was higher and the dislocati...
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#1Hui Guo (HIT: Harbin Institute of Technology)
#2LinFu Zhang (HIT: Harbin Institute of Technology)
Last. Peng Zhang (HIT: Harbin Institute of Technology)H-Index: 11
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The coalescence and melting process of different sizes and arrangements of Ag and Cu nanoparticles is studied through the molecular dynamics (MD) method. The results show that the twin boundary or stacking fault formation and atomic diffusion of the nanoparticles play an important role in the different stages of the heating process. At the beginning of the simulation, Cu and Ag nanoparticles will contact to each other in a very short time. As the temperature goes up, Cu and Ag nanoparticles may ...
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#1Peng Zhang (HIT: Harbin Institute of Technology)H-Index: 11
#2Han Wang (HIT: Harbin Institute of Technology)H-Index: 2
Last. Gang Chen (HIT: Harbin Institute of Technology)H-Index: 7
view all 6 authors...
The Cu–3 wt%Ag–0.5 wt%Zr are rolled with the same reduction process at room (RT) and cryogenic (CT) temperature, respectively. The electron backscatter diffraction and transmission electron microscope are used to analyze and compare the evolutions of material microstructure and texture. The results show that the stability of as-rolled CT sheets is different from that of the RT samples, which can be verified by the lower temperature for the occurrence of recrystallization and Ag-base particles pr...
1 CitationsSource
#1Chuanjie Wang (HIT: Harbin Institute of Technology)H-Index: 11
#2Haiyang Wang (HIT: Harbin Institute of Technology)H-Index: 2
Last. Peng Zhang (HIT: Harbin Institute of Technology)H-Index: 11
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The research on laser drilling of amorphous foils can promote the application of amorphous alloy in micro-machining. In this article, the effects of current, pulse width and defocusing amount on th...
1 CitationsSource
#1Chuanjie Wang (HIT: Harbin Institute of Technology)H-Index: 11
#2Haiyang Wang (HIT: Harbin Institute of Technology)H-Index: 2
Last. Peng Zhang (HIT: Harbin Institute of Technology)H-Index: 11
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Abstract The size effects on plastic deformation behaviors of metal thin sheets have a profound impact on the development of microforming process. In this study, the deformation and forming behaviors of pure nickel thin sheets with t/d
2 CitationsSource
#1Qiang Zhu (HIT: Harbin Institute of Technology)H-Index: 15
#2Gang Chen (HIT: Harbin Institute of Technology)H-Index: 7
Last. Peng Zhang (HIT: Harbin Institute of Technology)H-Index: 11
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Abstract Nickel-based superalloys have become the critical materials of micro-parts depending on outstanding mechanical properties. The effects of the grain size and precipitates on the mechanical properties at the mesoscopic scale are difficult to be revealed using conventional macroscopic material constitutive models. In the present study, the microstructure evolution of the γ″ phase and the tensile mechanical properties of a nickel-based superalloy at the mesoscopic scale were investigated sy...
5 CitationsSource
#1Chuanjie Wang (HIT: Harbin Institute of Technology)H-Index: 11
#2Haiyang Wang (HIT: Harbin Institute of Technology)H-Index: 2
Last. Anping Dong (SJTU: Shanghai Jiao Tong University)H-Index: 13
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In this study, a new model involving energy is established to characterize the size effect on flow stress. The new model treats the experimental machine and the specimen as an isolated system, and this isolated system satisfies the Energy Conservation Law. The total work performed on the specimen by the experimental machine is nearly equal to the energy consumed by the specimen plastic deformation and the energy consumed by friction (which can be ignored when working without friction). The new m...
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#1Chuanjie Wang (HIT: Harbin Institute of Technology)H-Index: 11
#2Shaoxi Xue (HIT: Harbin Institute of Technology)H-Index: 3
Last. Peng Zhang (HIT: Harbin Institute of Technology)H-Index: 11
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Abstract The formability of metal micro-parts is difficult to predict by the traditional theories because of the size effects induced by the interactive effects of specimen intrinsic and extrinsic characteristics with miniaturization. In this study, the interactive effects of different parameters on the forming quality of micro channel by flexible forming were conducted. The forming characteristic of Cu/Ni clad foils was studied from the microstructure and stress-strain state. Experimental resul...
2 CitationsSource
#1Qiang Zhu (HIT: Harbin Institute of Technology)H-Index: 15
#2Gang Chen (HIT: Harbin Institute of Technology)H-Index: 7
Last. Peng Zhang (HIT: Harbin Institute of Technology)H-Index: 11
view all 5 authors...
Abstract The δ phase of nickel-based superalloys plays an important role in mechanical properties and fracture behavior. The tensile tests were conducted to reveal the fracture mechanism of the δ phase. The present study established a fracture model of the δ phase. The fracture of the δ phase occurs more easily when its long axis is closer to the loading axis. Compared to the needle-shaped δ phase, the granular δ phase is more difficult to fracture.
1 CitationsSource